Winternitz is a surname of Jewish pedigree originated from Vintířov. Notable people with the surname include:
- Adolfo Winternitz, also Adolf Gustav Winternitz (1906–1993), Austrian-Peruvian Jewish painter
- Artur Winternitz (1893–1961), British mathematician
- Emanuel Winternitz (1898–1983) curator emeritus of the Department of Musical Instruments of the New York City Metropolitan Museum of Art; musicologist, "father of the field of musical iconography"
- Friderike von Winternitz (1882–1971), Austrian author, first wife of Stefan Zweig
- Helen Winternitz, contemporary writer
- Hugo Winternitz (1868–1934), Austrian and German physician
- Jill Winternitz (born 1986/1987), American actress based in England
- Joseph Winternitz (1896–1952), Marxist politician, economist
- Judith Winternitz, Australian writer [1]
- Martha Winternitz-Dorda (1880–1958), Austrian female singer
- Moriz Winternitz (1863–1937), Austrian Jewish indologist
- Moshe Dovid Winternitz (1855–1944), Head of the Beth din Rabbinical Court in Satmar, Hungary; killed in Auschwitz concentration camp
- Pavel Winternitz (born 1936), Czechoslovakian and Canadian mathematical physicist
- Richard Winternitz (1861–1929), German painter
- Roland Winters, born Roland Winternitz (1904–1989), American actor
- Wilhelm Winternitz, (1834–1917), Austrian balneologist